CN111617853A

CN111617853A - Wet grinding system

Info

Publication number: CN111617853A
Application number: CN201911370668.4A
Authority: CN
Inventors: 占天义
Original assignee: Boyi Shenzhen Industrial Technology Co ltd
Current assignee: Boyi Shenzhen Industrial Technology Co ltd
Priority date: 2019-12-25
Filing date: 2019-12-26
Publication date: 2020-09-04

Abstract

The invention discloses a wet grinding system, which comprises a grinding cylinder provided with a feed inlet and a discharge outlet, wherein a material outlet in the grinding cylinder is provided with a separating device rotating during separation, the separating device comprises a separator provided with a central through hole along the axis direction, a separating hole communicated with the central through hole is arranged on the side surface of the rotating shaft direction of the separator, and the cross section of the separating hole is consistent with the diameter of the separator along the vertical direction of the rotating shaft of the separator. When the separator is used, the separation inlet on the separation hole is positioned below the plane passing through the center of the rotating shaft when the separator stops working, and the grinding balls are prevented from entering the central through hole through the separation hole when the separator stops working by utilizing the massage force between the grinding balls in the grinding cylinder and the tension force between the liquids, and are discharged when the separator works. The separating device is provided with the regular central through hole, the separating channel is shorter, the processing difficulty of the separating device can be reduced, and the excellent separating effect can be achieved. The rotation balance is easier to be ensured during high-speed rotation, and the structure is simple and compact.

Description

Wet grinding system

Technical Field

The invention relates to the technical field of ball milling, in particular to a wet grinding system.

Background

The existing wet ball milling crushing equipment comprises a grinding cylinder body, a stirrer or a disperser arranged on the grinding cylinder body and connected with a rotating shaft, and a separator arranged on a material discharge channel in the grinding cylinder body. The grinding balls added into the grinding cylinder body during grinding are about more than 2/3 of the cavity of the grinding cylinder body, when the separator adopting the centrifugal principle works, the disperser and the separator connected with the main shaft rotate at high speed, the grinding balls are distributed on the inner wall of the grinding cylinder body, the grinding balls distributed around the separator in the middle of the grinding cylinder body are fewer, and when the separation is carried out, only the ground materials can enter the discharge channel from the separation channel on the separator and are discharged under the action of centrifugal force. When the grinding device is in a static state, such as stop work or initial state, because the disperser and the separator do not rotate, the grinding balls are deposited on the lower part of the grinding cylinder body under the action of gravity, the separator is immersed by the grinding balls, part of the grinding balls can enter the separation channel of the separator, and part of the grinding balls can be discharged from the discharge channel when being reused, so that the quantity of the grinding balls in the grinding cylinder body is reduced, and the grinding efficiency is further influenced.

In order to prevent the grinding balls from entering the separation channel on the separator during the stationary state, the length of the separation channel is increased, for example, in the invention patent of the stirring ball mill with chinese patent No. CN101385989A, the separation channel is set to be a spiral structure, and the length of the separation channel is increased, so that the grinding balls are not easy to enter the separation channel and are discharged through the discharge channel during the operation even if the separator is immersed with the grinding balls during the stationary state because the separation channel is a bent structure. Although the above structure partially solves the problem of discharging the grinding balls through the separation passage, the separator is difficult to manufacture due to its complicated structure. Meanwhile, the dynamic balance of the separator during high-speed rotation is not easy to control, and the service life is influenced; meanwhile, the separation path is long in the separation channel with the spiral structure, so that the separation channel is easily blocked, and the separation efficiency is influenced.

Disclosure of Invention

The invention mainly solves the technical problem of providing a wet grinding system, which can prevent grinding balls from entering a separator to work and then being discharged when the separator is static, reduce the structural processing difficulty of the separator, reduce the length of a separation path when a separation channel is used and improve the separation efficiency.

In order to solve the problems, the invention provides a wet grinding system which comprises a grinding cylinder provided with a feeding hole and a discharging hole, wherein a material outlet in the grinding cylinder is provided with a separating device rotating during separation, the separating device comprises a separator provided with a central through hole along the axis direction, and the wet grinding system is characterized in that a separating hole communicated with the central through hole is arranged on the side surface of the rotating shaft direction of the separator, and the cross section of the separating hole is consistent with the diameter of the separator along the vertical direction of the rotating shaft of the separator.

Further, the separating holes are strip-shaped along the axial direction of the separator.

Furthermore, a first inclined plane is arranged at one side of the separation inlet of the strip-shaped separation hole along the length direction.

Further, the first inclined surface is inclined from the inside to the outside.

Further, the first inclined surface is inclined in the direction opposite to the rotating direction of the separator during operation.

Further, the separation hole is gradually enlarged from the separation inlet to the separation outlet along a section perpendicular to the axial direction of the separator, and the separation outlet is not larger than the diameter of the central through hole.

Furthermore, the surface of the other end of the separator, which is located at the diameter of the separation hole, is provided with a balance structure.

Further, the balancing structure comprises at least one balancing groove axially aligned with the separator.

Further, when the number of the balance grooves is even, the balance grooves are distributed symmetrically with the diameter of the separation hole; when the number of the balance grooves is odd, the balance grooves are symmetrically distributed by the balance grooves with the diameters of the separation holes.

Further, one side of the length direction of the balancing groove is provided with a second inclined surface which inclines from inside to outside.

Further, the second inclined surface is opposite to the rotating direction of the separator during operation.

Furthermore, baffle plates are respectively arranged on two sides of the separation hole along the direction of the rotating shaft in a staggered mode, and the projection of the adjacent baffle plates and the vertical plane of the section center line of the separation hole along the direction vertical to the rotating shaft are partially connected.

Furthermore, the included angle formed by the baffle and two side walls of the separation hole along the rotating shaft direction is an acute angle.

Furthermore, the included angle formed by the baffle and two side walls of the separation hole along the rotating shaft direction is 60-30 degrees.

Further, the wet grinding system also comprises sealing switches which are positioned at the feed inlet and the discharge outlet and used for maintaining the pressure of the grinding cylinder and the separation channel.

The grinding cylinder is internally provided with a dispersion device driven by a main shaft and a separation device driven by a hollow auxiliary shaft, one end of the dispersion device, which is close to the discharge port, is provided with a containing cavity for containing the separation device, the separation device is positioned in the containing cavity and forms a separation cavity with the wall of the containing cavity, and the hollow auxiliary shaft is communicated with a separation outlet on the separation device.

The grinding cylinder is internally provided with a dispersing device connected with a hollow rotating shaft, one end of the dispersing device, which is close to the discharge port, is provided with a containing cavity for containing the separating device, the separating device is positioned in the containing cavity and coaxially fixed with the dispersing device, a separating cavity is formed between the separating device and the cavity wall of the containing cavity, and a separating outlet on the separating device is communicated with the hollow rotating shaft.

Further, the wet grinding system further comprises a stopping mechanism for stopping the separation inlet at a specified position.

Further, the parking mechanism comprises a rotating speed detection mechanism for detecting the rotating speed of the separation device when grinding is stopped, a position detection mechanism for detecting a preset parking position, and a brake force braking mechanism determined according to the rotating speed detection mechanism and the position detection mechanism.

Further, the specified position includes below a plane separated from the center of the rotation axis of the device.

Further, the separation inlet is perpendicular to a plane passing through the center of the rotation shaft.

The invention discloses a wet grinding system, which comprises a grinding cylinder provided with a feed inlet and a discharge outlet, wherein a material outlet in the grinding cylinder is provided with a separating device rotating during separation, the separating device comprises a separator provided with a central through hole along the axis direction, a separating hole communicated with the central through hole is arranged on the side surface of the separator in the rotating shaft direction, and the cross section of the separating hole is consistent with the diameter of the separator along the vertical direction of the rotating shaft of the separator. When the centrifugal grinding machine is used, the separating inlet on the separating hole is positioned below the plane passing through the center of the rotating shaft when the separator stops working, and by properly setting the size of the separating hole, the grinding balls in the grinding cylinder are prevented from entering the central through hole through the separating hole by using the massage force between the grinding balls and the tension action between the liquid, and the grinding balls are discharged when the centrifugal grinding machine is in work. The separating device is provided with the regular central through hole, the separating channel is shorter, the processing difficulty of the separating device can be reduced, and the excellent separating effect can be achieved. The rotation balance is easier to be ensured during high-speed rotation, and the structure is simple and compact.

Drawings

In order to illustrate the embodiments of the invention or the technical solutions in the prior art more clearly, the drawings that are needed in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the description only show some embodiments of the invention and therefore should not be considered as limiting the scope, and for a person skilled in the art, other related drawings can also be obtained from these drawings without inventive effort.

FIG. 1 is a schematic sectional view of an embodiment of a grinding system along a rotation axis.

Fig. 2 is a schematic structural view taken along the direction E-E in fig. 12 in a stationary state.

Fig. 3 is a schematic structural view taken along the direction E-E in fig. 12 in an operating state.

FIG. 4 is a schematic cross-sectional view of another embodiment of the polishing system along the rotation axis.

FIG. 5 is a schematic sectional view of the first embodiment of the separator taken along the direction of the rotation axis.

Fig. 6 is a schematic sectional view along a-a in fig. 5.

FIG. 7 is a schematic axial sectional view of the separator assembled with the shaft.

FIG. 8 is a sectional view of the second embodiment of the separator along the direction of the rotation axis.

Fig. 9 is a schematic sectional view taken along the direction B-B in fig. 8.

FIG. 10 is a schematic sectional view of a third embodiment of the separator taken along the direction of the rotation axis.

Fig. 11 is a schematic sectional view taken along the direction C-C in fig. 10.

Fig. 12 is a schematic sectional view of the fourth embodiment of the separating apparatus taken along the direction of the rotating shaft.

Fig. 13 is a schematic sectional view taken along the direction D-D in fig. 12.

FIG. 14 is a schematic sectional view of the fourth embodiment of the separator taken along the direction of the rotation axis.

Fig. 15 is a schematic sectional view taken along the direction D-D in fig. 14.

Fig. 16 is a cross-sectional structural schematic of another embodiment of the balancing mechanism.

FIG. 17 is a schematic sectional view of the fourth embodiment of the separator taken along the vertical direction of the rotating shaft.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The following claims are presented to illustrate the invention in further detail in conjunction with specific embodiments and the accompanying drawings, it being understood that the described embodiments are only some of the embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that in the description of the present invention, all directional terms such as "upper", "lower", etc., are used herein to indicate orientations or positional relationships, and are used for convenience in describing the present invention or for convenience in describing the conventional arrangement of the present invention, and do not indicate or imply that the device or component being referred to must have a particular orientation, be constructed in a particular orientation, and be operated. For the purpose of explaining the relative positional relationship of the components, the movement, etc., as shown in the drawings, when the specific attitude is changed, the directional indication may be changed accordingly.

Furthermore, the descriptions herein as relating to "first," "second," etc. are merely for distinguishing and are not intended to indicate or imply relative importance or to implicitly indicate the number of technical features indicated. The technical features of the first and second aspects can be combined with at least one of the technical features in an explicit or implicit manner. In the description of the present invention, "a plurality" means at least two, i.e., two or more, unless expressly defined otherwise; the meaning of "at least one" is one or both.

As shown in fig. 1 and 2, the present invention provides an embodiment of a wet grinding system.

This wet grinding system is including being equipped with feed inlet 5 and discharge gate C's grinding vessel 3, and material outlet is equipped with pivoted separator when separating in grinding vessel 3, and this separator includes along the separator 1 that the axle center direction was equipped with central through-hole, is equipped with the separation hole with central through-hole intercommunication in the side of the 1 pivot direction of this separator, and this separation hole is unanimous with the separator diameter along separator pivot vertical direction cross-section.

Specifically, the wet grinding system further comprises a sealing switch 8 positioned at the discharge port for maintaining the pressure of the grinding cylinder 3 and the separation channel and a pressure relief switch 6 for relieving the pressure during shutdown. The grinding cylinder 3 is internally provided with a dispersion device 2 driven by a main shaft and a separation device driven by a hollow auxiliary shaft, one end of the dispersion device, which is close to the discharge port, is provided with a containing cavity for containing the separation device, the separation device is positioned in the containing cavity and forms a separation cavity B with the cavity wall of the containing cavity, and the hollow auxiliary shaft is communicated with a separation outlet on the separation device. The dispersing device 2 can adopt other structures such as the existing dispersing wheel or turbine which can drive the grinding balls and the materials to move so as to achieve the grinding effect.

When the dispersing device works, the motor 7 drives the main rotor to rotate, and the main rotor drives the dispersing device 2 to rotate; the separating device, such as a separator, is driven by another motor to rotate the auxiliary shaft. A grinding cavity A is formed between the dispersing device 2 and the inner wall of the grinding cylinder 3, and grinding materials and grinding balls are mainly ground in the grinding cavity A under the driving of the dispersing device 2 in work.

In this embodiment, the separating device and the dispersing device are respectively driven by two transmission shafts, the power consumed during grinding is large, and in order to save energy, the separating device and the dispersing device can be driven by one transmission shaft, namely, the separating device and the dispersing device rotate synchronously. As shown in fig. 4, the dispersing device 2 and the separating device may also rotate synchronously as required, that is, the dispersing device connected to the hollow rotating shaft is disposed in the grinding cylinder, a cavity for accommodating the separating device is disposed at one end of the dispersing device close to the discharge port, the separating device is disposed in the cavity and coaxially fixed to the dispersing device, a separation cavity is formed between the separating device and the cavity wall of the cavity, and a separation outlet of the separating device is communicated with the hollow rotating shaft.

As shown in fig. 5 to 7, the separation holes 11 are strip-shaped holes arranged along the length direction of the separator 1, that is, the separation holes 11 are strip-shaped along the axial direction of the separator.

When in use, the separation hole 11 is directly connected with the central through hole 12 on the separator 1, namely, the path connecting the separation hole 11 with the central through hole 12 is shortest, so that the ground materials can be separated out through the separation hole 11 more easily during grinding, and the separation efficiency is prevented from being influenced by the easy blockage formed when the path of the separation hole 11 is longer.

In this embodiment, the separation hole 11 has a cylindrical shape in its central cross section. According to the requirement, the separation holes 11 may be arranged in other structures, in this embodiment, the separation holes 11 are arranged as shown in fig. 8 and 9, that is, the separation holes 11 gradually expand from the separation inlet 110 to the separation outlet 111 along the section perpendicular to the axial direction of the separator, and the separation outlet 111 is not larger than the diameter of the central through hole 12. Therefore, the grinding balls can be prevented from easily entering the separation holes 11 during separation, and simultaneously, the material separation which is finished by grinding can be conveniently realized by generating larger centrifugation during high-speed rotation, so that the separation efficiency is improved.

As shown in fig. 10 and fig. 11, in order to better enable the separator 1 to convey the grinding balls entering the separation chamber into the grinding chamber during the separation process, the phenomenon that the grinding balls enter the separation holes 11 to form blockage is reduced. A first inclined surface 113 is provided at the separation inlet 110 of the strip-shaped separation hole 11 along one side in the length direction, and the first inclined surface 13 is inclined from the inside to the outside. The direction of the first inclined surface 13 is not particularly limited, and may be set as required, and in this embodiment, the direction opposite to the rotation direction of the separator during operation is adopted, that is, the first inclined surface 13 is inclined in the opposite direction to the rotation direction, so that when the separator 1 rotates at a high speed, the outward movement power can be provided for the grinding balls entering the separation holes 11, and meanwhile, the outward movement power can be provided for the grinding balls located in the separation cavity, for example, located near the surface of the separator 1, so as to convey the grinding balls to the grinding cavity farther away from the separator.

The first inclined plane 113 can also be combined with the embodiments shown in fig. 6 and fig. 9, as shown in fig. 10-fig. 13, and the function thereof is the same as that described above, and is not repeated.

Because the separation holes 11 that separator set up only distribute in column body pivot one side, in order to guarantee operating condition, separator high-speed rotation produces the rotation unbalance easily, influences life. According to the position of the separation hole 11, dynamic balance is better ensured, and the setting difficulty is reduced. A balance structure is arranged on the surface of the other end of the separator 1, which is positioned at the diameter of the separation hole 11, as shown in fig. 14-16. The balancing structure comprises at least one balancing groove 14 axially aligned with the axis of rotation of the separator 1. The number of the balance grooves 14 is not limited, and the balance grooves 14 can be arranged according to requirements, and when the number of the balance grooves 14 is even, the balance grooves 14 are distributed symmetrically with the diameter of the separation hole 11; when the number of the balance grooves 14 is odd, the balance grooves 14 are symmetrically distributed on the diameter of the separation hole 11.

A second inclined surface 141 inclined from the inside to the outside is provided on one side in the longitudinal direction of the equilibrium tank 14 during polishing. The direction of the second inclined plane 141 is not particularly limited, and it is set according to the requirement, in this embodiment, the direction opposite to the rotation direction when the separator 1 works is adopted, that is, the second inclined plane 141 is inclined to the opposite rotation direction, so that when the separator 1 rotates at a high speed, the grinding balls located in the separation cavity, for example, the grinding balls located near the surface of the separator 1, can be provided with the power of moving outwards, and the grinding balls can be conveyed into the grinding cavity farther away from the separator, so as to avoid the formation of blockage near the separation hole 11, which affects the separation efficiency.

The balancing mechanism in the present embodiment may be implemented by a person alone, or may be combined with the first slope 13 provided in the above embodiments as needed.

As shown in fig. 17, in order to prevent the grinding balls from entering the separation holes 11 and being discharged during the grinding process or at a stop, the following arrangement is made. Baffles 15 are respectively arranged on two sides of the separation hole 11 along the direction of the rotating shaft in a staggered mode, and partial connection exists between adjacent baffles 15 and the vertical plane projection of the section center line of the separation hole 11 along the direction vertical to the rotating shaft.

When the ball grinder is used, the baffles 15 are arranged in a staggered mode, so that grinding balls can be prevented from entering the separation hole 11 under the action of gravity and being discharged when the ball grinder is started when the separation hole 11 is positioned above the separation inlet 110 after the machine is stopped.

The baffle 15 and the two side walls of the separation hole 11 along the rotating shaft direction form an acute angle A. The baffle and the two side walls of the separation hole along the rotating shaft direction form an included angle A of 60-30 degrees.

In order to better avoid that the unground material and grinding balls enter the central through hole 12 through the separation holes 11 in the separator of the above-described construction after the grinding is stopped, the grinding balls are discharged. The wet grinding system further includes a stopping mechanism that stops the separation inlet at a designated position. The parking mechanism comprises a rotating speed detection mechanism for detecting the rotating speed of the separation device when grinding is stopped, a position detection mechanism for detecting a preset parking position, and a brake force braking mechanism determined according to the rotating speed detection mechanism and the position detection mechanism. When the separator is in work, the separator driving motor continues to rotate under the action of inertia after being powered off, the rotating speed detection mechanism detects the rotating speed, when the rotating speed reaches an empirical value obtained according to a rotating speed test, the brake mechanism is controlled to brake the separator, meanwhile, the position detection mechanism detects the direction of a separation hole in the separator, when the rotating speed is smaller than a preset value and the direction of the separation hole is located in a parking interval, the brake mechanism stops the separator, and the separation hole is stopped at a preset position.

Since the grinding slurry in the grinding bowl will submerge the separator and most of the dispersion devices during grinding, grinding balls and grinding stock will easily enter the separation opening 11 when the separation inlet 110 of the separation opening 11 is located above the level of the axis of the separator. The designated position thus includes a position below the plane passing through the center of the rotating shaft of the separation device, and is difficult to enter the separation holes 11 in cooperation with the size of the separation holes appropriately provided under the tensile and frictional forces between the abrasive slurries. The perpendicular effect of the separation inlet 110 of the separation opening 11 in the separator to the plane passing through the centre of the rotation axis is optimal.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments or equivalents may be substituted for some of the features of the embodiments described above, and such modifications or substitutions may be made without departing from the spirit and scope of the present invention in its aspects.

Claims

1. The wet grinding system comprises a grinding cylinder provided with a feeding hole and a discharging hole, wherein a material outlet in the grinding cylinder is provided with a separation device rotating when separation is carried out, the separation device comprises a separator provided with a central through hole along the axis direction, and the wet grinding system is characterized in that a separation hole communicated with the central through hole is arranged on the side surface of the rotating shaft direction of the separator, and the cross section of the separation hole along the vertical direction of the rotating shaft of the separator is consistent with the diameter of the separator.

2. The wet grinding system of claim 1, wherein: the separating holes are strip-shaped along the axial direction of the separator.

3. The wet grinding system of claim 2, wherein: a first inclined plane is arranged at one side of the separation inlet of the strip-shaped separation hole along the length direction.

4. The wet grinding system of claim 3, wherein: the first inclined surface inclines from inside to outside, and the inclined direction of the first inclined surface is opposite to the rotating direction of the separator during operation.

5. The wet grinding system of claim 3, wherein: the separation holes progressively enlarge in a direction perpendicular to the axial section of the separator from the separation inlet to the separation outlet, the separation outlet being no larger than the diameter of the central through hole.

6. The wet grinding system of claim 1, wherein: and a balance structure is arranged on the surface of the other end of the separator, which is positioned at the diameter of the separation hole.

7. The wet grinding system of claim 6, wherein: the balancing structure comprises at least one balancing groove axially aligned with the separator.

8. The wet grinding system of claim 7, wherein: when the number of the balance grooves is even, the balance grooves are distributed symmetrically with the diameter of the separation hole; when the number of the balance grooves is odd, the balance grooves are symmetrically distributed by the balance grooves with the diameters of the separation holes.

9. The wet grinding system of claim 7, wherein: and one side of the length direction of the balance groove is provided with a second inclined plane which inclines from inside to outside.

10. The wet grinding system of claim 9, wherein: the second inclined plane rotates in the direction opposite to the rotating direction of the separator during working.

11. The wet grinding system of claim 1, wherein: baffles are respectively arranged on two sides of the separation hole along the direction of the rotating shaft in a staggered mode, and partial connection exists between adjacent baffles and the projection of the vertical plane of the section center line of the separation hole along the direction vertical to the rotating shaft.

12. The wet grinding system of claim 11, wherein: the baffle and the separation hole both sides wall along the pivot direction form the contained angle for the acute angle.